Chapter: It is recommended to pray Duha, the least of which is two rak`ah, the best of which is eight, and the average of which is four or six, and encouragement to do so regularly
Mu'adha asked 'A'isha (Allah be pleased with her) how many rak'ahs Allah's Messenger ( صلی اللہ علیہ وسلم ) prayed at the forenoon prayer. She replied: Four rak'ahs, but sometimes more as he pleased.
Authentic
